Already posted in Moped repair but figured some don't venture there so. I have an 80cc kitted v1 with new bearings and seals. Techno estoril pipe. 19mm carb with 86 jet. Starter clutch engages all the way. 150 compression. It will fire but only every time. Sometimes it only runs when the starter clutch is engaged. Sometimes it backfires. Haven't really messed with points and timing but it should be good enough to run. Has good enough compression to run. Has spark. Fuel is fine (It's getting it). I'm stumped. Mark Ryan feel free to chime in.